Improvement in protection-rods for looms



G. HET'HERINGTON.

PROTECTION Bons FOR Looms.

Patented May 9,1876.

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GEORGEHETHERINGTON, OFv PHILADELPHIA, PENNSYLVANIA.

IMPROVEMENT IN PROTECTION-RODS FQR LOOIVIS.

Specification forming part of Letters Patent No. 177,244, dated May 9,18765 application filed January 7, 1876.

following 'to be a full, clear, and exact description of the invention,such as will enable others skilled in the art to which it pertains tomake and use it, reference being had to the accompanying drawings, whichform partof this specification, in which- 'Figure lis a perspective ofmy invention. Fig. 2 is a broken side elevation, partlyin section.

My improvement is designed to totally prevent smashes 7 in the warp whenany breaking or displacing of parts of the loom occurs, a smash beingthe breaking of a large number of threads by the shnttles being in theshed when the lay comes up to the cloth. The circumstances under which asmash willordinarily occurlaredirst, the breaking ofthe picking-strap 5second,the breakingof the pickingstick 5 third, the displacing ofthepicking-boll 5 fourth, the rising or dropping of the dropbox at thewrong time; fifth, the putting` in by the weaver, through ignorance orforgetfulness, of too many shuttles.

My improvement consists in the provision of two striking-lingers,projecting from the back of the protection-rod toward thc rear of theloom, and the combination, with the rod thus provided, of apparatuswhereby, when the lay is moving backwardly, the loom will be stopped, ifthe shuttle is not out of the box on either side, when the crank-.armsare within an inch, more or less, of the back center.

Referring to the accompanying drawing, A

A designate the frame of the loom 5 B, the shaft to which the powerisapplied, having fastand loose pulleys b and b', respecth'ely; C, theshifting lever, operating upon the belt B through the medium of thepivoted rod D, and E the lay, these several parts being of the usual orany suitable construction. F is the protection-rod, Yhaving the usualforwardlyprojecting finger f. G G are the fingers on this rod, (one ateach end,) projecting toward the back of the loom. H H are clampsfastcned to the framing-piece A by a bolt, l1., passing through anelongated opening, a; and I is a slide, having a motion between thefront and back of the loom beneath said clamps. A curved stud, K,projects backwardly from the slide Lits point kimpin ging against thcnotched end of one ot the arms l of the hollow shaft L, which turns onaspindle or bolt, M, adjustably 'secured in an elongated slot, m, in theframepiece A1. Nis a bar connecting the other arm l of the shaft L withthe sliding clamp O on the forward part of the frame-piece 5 and ois astud on said clamp, against which the shifting-lever C, or a pin orhook, o, attached thereto, impinges when said lever is in the notch o inthe keeper G'-the position said lever occupies when the band is on thefast pulley, and the loom is running. P is a swell-iinger 7 on the backof the box T, and R an arm attached to the protection-rod, and kept incontact with the swell-finger by means oi' a spring, T', fastened tosaid box by a pin or pins t t, or by equivalent screws.

When a loom provided with the aforesaid devices is running, if thepicking motion be set right the shuttle S will be clear of the box T,and on its way across the lay E, when the crank (not shown in thedrawing) is about an inch and a half from its back center, therebyallowing the swell-lin ger P to come close to the box T, and thestriking-finger G to rise above and pass over the shoulder z' of theslide I. The loom continues running until one of the aforesaidaccidental circumstances occurs, when, theshuttle being in the box afterthe proper distance has been passed, the linger Gr strikes the shoulderi, said finger being then depressed, movin g the slide I backwardly. Thebackward movement of the slide I has the effect of moving the slide Oforward', and thus throwing the'shifting-lever or stop-bar77 C out ofthe notch c through the medium of the stud K, shaft L, arms l l', bar N,and stud 0. The belt is thus shifted to the loose pulley. After thelinger G has moved backward far enough to throw the shifting-lever C outof the notch c the slide I is stopped by coming in contact with theupright parat A2 of the loom at the same time that the finger G on theother end of the rod F strikes a block, U, firmly fastened to the frameA, and having a shoulder, u, thereby effectually preventing the cranksfrom going over the back center. On restoring the shifting-lever C toits proper pooition for starting theloom the slide O is pushed back bythe impact of the pin c against the stud o, thus bringing the slide Iback to its normal place through the medium of the parts connecting saidslides. What I claim as my invention is 1. In combination with the layand shippin g mechanism, a loom-protection rod, operated by thesvvell-nger of the box, having a for- Wardly-projecting finger `toprevent smashes While the shuttle is out of the box, and arearwardly-projecting finger to prevent smashes Y while the shuttle isin the box, substantially as shown and described.

2. The combination of the boxT, having a sWelLnger, P, theprotectiolrrod F, `having arm R. and nger G, :the slide I, stud K, shaftL, having arms l l', bar N, slide lO, and shiftinglever C, the severalparts being constructed and operating substantially as described, tostop the loom and prevent smashes, as set forth. i

3. In combination with the protection-rod 'F vand. fingers G G', theblock U, for preventing the cranks from passing the dead center, asdescribed.

' In testimony that I claim the foregoing I have hereunto set my handthis 3d day of January, 1876.`

GEORGE HETHERIN GTON.`

Witnesses M. DANL. GoNNoLLY, Ones., F. VAN HORN.

